Brand Showdown · 2026
Three brands that dominate the water-filter conversation online. Three very different filtration philosophies. We tested all three against the same lab panel — here's what actually came out the other side.
The verdict up top
Clearly Filtered wins on PFAS and contaminant breadth. Aquasana wins on daily convenience and value. Berkey wins on off-grid resilience. None of them is wrong — they're optimized for different problems.
An affinity-filter brand built around a proprietary blend of activated carbon, ion-exchange resin, and other media that the company doesn't fully disclose. Focused heavily on "emerging contaminants" — PFAS, pharmaceuticals, microplastics. Pitcher, under-sink, and shower options.
Gravity-fed stainless-steel countertop units with ceramic-shell elements. Old-school, survivalist-adjacent brand identity. No electricity, no plumbing; fill the top, pour from the bottom. Recent regulatory trouble in California over EPA pesticide-device registration — worth knowing before you buy.
A mainstream brand with the broadest product range: countertop, under-sink, whole-house, and shower. Their flagship Claryum technology is a multi-stage carbon-block plus ion-exchange design. Heavily NSF-certified across specific contaminant standards.
| Contaminant | Clearly Filtered (Pitcher) |
Berkey (Big Berkey + black elements) |
Aquasana (Claryum 3-Stage Max Flow) |
|---|---|---|---|
| Chlorine | ● Non-detect | ● Non-detect | ● Non-detect |
| Lead | ● <1 ppb | ● <1 ppb | ● <1 ppb |
| PFOA | ● Non-detect | Partial | ● Non-detect |
| PFOS | ● Non-detect | Partial | ● Non-detect |
| GenX (short-chain) | Partial | ○ Limited | Partial |
| Arsenic (V) | ● Non-detect | ● Non-detect | ○ Not rated |
| Fluoride | ● Removed | ● With PF-2 add-on | ○ Not removed |
| Pharmaceuticals | ● Removed | Partial | Partial |
| Microplastics | ● Full | ● Full | ● Full |
Data from Clean Living Lab 2026 independent testing. Samples collected under controlled conditions; effluent sent to an ELAP-accredited lab. "Non-detect" = below reporting limit.
Best contaminant profile of the three. Also the slowest flow rate — a full pitcher takes 10–12 minutes to filter in our tests. Filter cartridges are expensive relative to the volume of water they produce. The pitcher itself feels premium; glass option is stunning.
We'd recommend it if PFAS is your specific concern and you don't need a lot of water per day.
A Berkey is a piece of furniture. The stainless-steel unit takes up real counter space, you have to manually fill the top, and you pour from a spigot rather than refill a pitcher. In return: zero electricity, long-lasting filter elements, and genuine off-grid capability.
For a vacation cabin or earthquake-country home, Berkey is obvious. For a Brooklyn apartment kitchen, it's overkill.
The Claryum 3-Stage lives under the sink and delivers water through a dedicated faucet at full pressure. It doesn't need electricity, doesn't waste water, and doesn't ask anything from you except filter changes every six months. Of the three, it's the one you forget about — which is the highest compliment we can give a filter.
Price tags lie. What matters is cost per gallon over the life of the system. Our estimates for a family of four, three years of use:
Berkey wins on pure economics, which is part of why it's a survivalist favorite. Aquasana is the best value among fast-flow systems. Clearly Filtered is a premium you pay for contaminant breadth in a pitcher form factor.
Your water report shows detected PFAS or pharmaceuticals, you live alone or with a partner (not a family of five), and you want pitcher form factor. It's the most contaminant-removing pitcher we've tested.
You want resilience over speed. You're in a region with fragile utilities, you want a filter that keeps working in a power outage, or you want filter-cost per gallon to approach zero over a long timeline. Be aware of the California regulatory situation if you live there.
You want the best everyday-use system for a family. Full pressure, invisible installation, NSF-certified across the contaminant standards that matter for most municipal water. This is the pick for 80% of readers.
Why these three brands
These aren't three competitors of the same product — they're optimized for different problems (emerging contaminants, off-grid, daily use). We compared on fit, not just specs.
All three were tested against the same municipal water input (mid-Atlantic, chlorinated, PFOA 6.2 ppt) to make the contaminant-reduction numbers comparable.
Post-filter samples from every unit were sent to an accredited lab. We cross-checked the results against each brand's published NSF performance sheets.
Every unit was installed and used in a household for 30+ days. Flow rate, refill frequency, cartridge-change difficulty, and taste all tracked on a fixed rubric.
The bottom line
If PFAS is specifically the concern, go Clearly Filtered. If you want power-independent resilience, go Berkey. For everyone else — the 80% — Aquasana Claryum is the right everyday-use pick. Full pressure, invisible under-sink install, six-month filter changes.
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